5.0
MEDIUM
CVSS 2.0
CVE-2015-3281
HAProxy Buffer Re-Alignment Information Disclosure
Description
The buffer_slow_realign function in HAProxy 1.5.x before 1.5.14 and 1.6-dev does not properly realign a buffer that is used for pending outgoing data, which allows remote attackers to obtain sensitive information (uninitialized memory contents of previous requests) via a crafted request.
INFO
Published Date :
July 6, 2015, 3:59 p.m.
Last Modified :
April 12, 2025, 10:46 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2015-3281
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] |
Solution
HAProxy is vulnerable to an information disclosure issue; upgrading to a patched version resolves the vulnerability.
- Update the HAProxy packages.
- If running Debian, upgrade to version 1.5.8-3+deb8u1.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2015-3281.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2015-3281 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2015-3281
weaknesses.
CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call
CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities
CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables
CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow
CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow
CAPEC-42: MIME Conversion MIME Conversion
CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File
CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links
CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags
CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion
CAPEC-100: Overflow Buffers Overflow Buffers
CAPEC-123: Buffer Manipulation Buffer Manipulation
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2015-3281 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2015-3281 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference http://git.haproxy.org/?p=haproxy-1.5.git%3Ba=commit%3Bh=7ec765568883b2d4e5a2796adbeb492a22ec9bd4 Added Reference http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00001.html Added Reference http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00023.html Added Reference http://rhn.redhat.com/errata/RHSA-2015-1741.html Added Reference http://rhn.redhat.com/errata/RHSA-2015-2666.html Added Reference http://www.debian.org/security/2015/dsa-3301 Added Reference http://www.haproxy.org/news.html Added Reference http://www.securityfocus.com/bid/75554 Added Reference http://www.ubuntu.com/usn/USN-2668-1 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Feb. 13, 2023
Action Type Old Value New Value Changed Description An implementation error related to the memory management of request and responses was found within HAProxy's buffer_slow_realign() function. An unauthenticated remote attacker could possibly use this flaw to leak certain memory buffer contents from a past request or session. The buffer_slow_realign function in HAProxy 1.5.x before 1.5.14 and 1.6-dev does not properly realign a buffer that is used for pending outgoing data, which allows remote attackers to obtain sensitive information (uninitialized memory contents of previous requests) via a crafted request. Removed CVSS V2 Red Hat, Inc. (AV:N/AC:L/Au:N/C:P/I:N/A:N) Removed Reference https://access.redhat.com/errata/RHSA-2015:1741 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2015:2666 [No Types Assigned] Removed Reference https://access.redhat.com/security/cve/CVE-2015-3281 [No Types Assigned] Removed Reference https://bugzilla.redhat.com/show_bug.cgi?id=1239072 [No Types Assigned] -
CVE Modified by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Changed Description The buffer_slow_realign function in HAProxy 1.5.x before 1.5.14 and 1.6-dev does not properly realign a buffer that is used for pending outgoing data, which allows remote attackers to obtain sensitive information (uninitialized memory contents of previous requests) via a crafted request. An implementation error related to the memory management of request and responses was found within HAProxy's buffer_slow_realign() function. An unauthenticated remote attacker could possibly use this flaw to leak certain memory buffer contents from a past request or session. Added CVSS V2 Red Hat, Inc. (AV:N/AC:L/Au:N/C:P/I:N/A:N) Removed Reference http://git.haproxy.org/?p=haproxy-1.5.git;a=commit;h=7ec765568883b2d4e5a2796adbeb492a22ec9bd4 [Patch, Vendor Advisory] Added Reference https://access.redhat.com/errata/RHSA-2015:2666 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2015:1741 [No Types Assigned] Added Reference http://git.haproxy.org/?p=haproxy-1.5.git%3Ba=commit%3Bh=7ec765568883b2d4e5a2796adbeb492a22ec9bd4 [No Types Assigned] Added Reference https://access.redhat.com/security/cve/CVE-2015-3281 [No Types Assigned] Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1239072 [No Types Assigned] -
Modified Analysis by [email protected]
Jun. 26, 2019
Action Type Old Value New Value Changed Reference Type http://git.haproxy.org/?p=haproxy-1.5.git;a=commit;h=7ec765568883b2d4e5a2796adbeb492a22ec9bd4 No Types Assigned http://git.haproxy.org/?p=haproxy-1.5.git;a=commit;h=7ec765568883b2d4e5a2796adbeb492a22ec9bd4 Patch, Vendor Advisory Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00001.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00001.html Mailing List, Third Party Advisory Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00023.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00023.html Mailing List, Third Party Advisory Changed Reference Type http://rhn.redhat.com/errata/RHSA-2015-1741.html No Types Assigned http://rhn.redhat.com/errata/RHSA-2015-1741.html Third Party Advisory Changed Reference Type http://rhn.redhat.com/errata/RHSA-2015-2666.html No Types Assigned http://rhn.redhat.com/errata/RHSA-2015-2666.html Third Party Advisory Changed Reference Type http://www.debian.org/security/2015/dsa-3301 No Types Assigned http://www.debian.org/security/2015/dsa-3301 Third Party Advisory Changed Reference Type http://www.securityfocus.com/bid/75554 No Types Assigned http://www.securityfocus.com/bid/75554 Third Party Advisory, VDB Entry Changed Reference Type http://www.ubuntu.com/usn/USN-2668-1 No Types Assigned http://www.ubuntu.com/usn/USN-2668-1 Third Party Advisory Changed CPE Configuration OR *cpe:2.3:a:haproxy:haproxy:1.5:dev:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev0:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev1:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev10:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev11:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev12:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev13:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev14:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev15:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev16:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev17:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev18:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev19:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev2:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev3:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev4:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev5:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev6:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev7:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev8:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev9:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.0:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.1:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.2:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.3:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.4:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.5:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.6:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.7:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.8:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.9:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.10:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.11:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.12:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.13:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.6:dev:*:*:*:*:*:* OR *cpe:2.3:a:haproxy:haproxy:1.5:dev:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev0:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev1:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev10:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev11:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev12:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev13:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev14:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev15:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev16:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev17:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev18:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev19:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev2:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev3:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev4:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev5:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev6:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev7:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev8:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev9:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.0:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.1:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.2:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.3:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.4:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.5:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.6:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.7:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.8:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.9:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.10:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.11:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.12:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.13:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.6:dev0:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:opensuse:linux_enterprise_high_availability_extension:12:*:*:*:*:*:*:* *cpe:2.3:o:opensuse:openstack_cloud:5:*:*:*:*:*:*:* *cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_eus:7.1:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_eus:7.2:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 28, 2016
Action Type Old Value New Value Added Reference http://www.ubuntu.com/usn/USN-2668-1 [No Types Assigned] -
CVE Modified by [email protected]
Dec. 24, 2016
Action Type Old Value New Value Added Reference http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00023.html [No Types Assigned] -
CVE Modified by [email protected]
Dec. 22, 2016
Action Type Old Value New Value Added Reference http://rhn.redhat.com/errata/RHSA-2015-1741.html [No Types Assigned] -
CVE Modified by [email protected]
Dec. 08, 2016
Action Type Old Value New Value Added Reference http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00001.html [No Types Assigned] -
CVE Modified by [email protected]
Dec. 07, 2016
Action Type Old Value New Value Added Reference http://rhn.redhat.com/errata/RHSA-2015-2666.html [No Types Assigned] -
CVE Modified by [email protected]
Nov. 28, 2016
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/75554 [No Types Assigned] -
Modified Analysis by [email protected]
Jul. 09, 2015
Action Type Old Value New Value Added CPE Configuration Configuration 1 OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Configuration 2 OR *cpe:2.3:a:haproxy:haproxy:1.5:dev:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev0:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev1:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev10:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev11:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev12:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev13:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev14:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev15:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev16:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev17:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev18:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev19:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev2:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev3:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev4:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev5:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev6:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev7:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev8:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5:dev9:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.0:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.1:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.2:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.3:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.4:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.5:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.6:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.7:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.8:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.9:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.10:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.11:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.12:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.5.13:*:*:*:*:*:*:* *cpe:2.3:a:haproxy:haproxy:1.6:dev:*:*:*:*:*:* Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:N/A:N) Changed Reference Type http://www.haproxy.org/news.html No Types Assigned http://www.haproxy.org/news.html Advisory, Patch Added CWE CWE-119 -
Initial Analysis by [email protected]
Jul. 08, 2015
Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.09 }} 0.01%
score
0.27305
percentile